CVE-2022-26640Public exploitNetwork attack vector

Authenticated memory corruption via crafted minAddress input

Published Mar 28, 2022 · Updated Aug 3, 2024

Buffer overflow in TP-Link TL-WR840N(ES) 6.20 allows remote authenticated users to corrupt memory through a crafted minAddress value. The public record identifies minAddress as the triggering input but does not disclose the handler, destination buffer, or failing copy operation. High-privilege access to the network management interface is required, and published evidence establishes neither code execution nor a specific service failure.

CVSS severity7.2
High
EPSS probability1.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Buffer overflow in TP-Link TL-WR840N(ES) 6.20 allows remote authenticated users to corrupt memory through a crafted minAddress value. The public record identifies minAddress as the triggering input but does not disclose the handler, destination buffer, or failing copy operation. High-privilege access to the network management interface is required, and published evidence establishes neither code execution nor a specific service failure.

The record

CVE
CVE-2022-26640
Published
Mar 28, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-120
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Mar 28, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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